7500 Ge port over CAT5 connection options

Hi, have a scenario where I need to implement FCIP however, the network switch I need to plug into the 7500 Ge ports does not have any Fiber ports available - only CAT5... I can't find any HW options for swapping out the 7500 Ge interface SFPs for RJ-45 ports. Is the only option to use an external Fiber->CAT5 adaptor btwn the 7500 and network switch (Catalyst 6509)?